Perhaps you should try some spelling variations:
petr » petri (Expand Search), petro (Expand Search), per (Expand Search)
petru » petriu (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search), petri (Expand Search)
petroio » petrioio (Expand Search), petrooio (Expand Search), peroio (Expand Search)
petris » petriis (Expand Search), petrois (Expand Search), peris (Expand Search), petri (Expand Search)
petrois » petriois (Expand Search), petroois (Expand Search), perois (Expand Search)
petrov » petriov (Expand Search), petroov (Expand Search), perov (Expand Search), petro (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (perouiv OR ((((petr OR petru) OR (petroio OR (petris OR petrois))) OR petrov) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (perouiv OR ((((petr OR petru) OR (petroio OR (petris OR petrois))) OR petrov) OR peter)) o.s.*".